TY - JOUR T1 - Ultrasound guidance for peripheral nerve blocks: an observational trend study of national data JF - Regional Anesthesia & Pain Medicine JO - Reg Anesth Pain Med DO - 10.1136/rapm-2019-101113 SP - rapm-2019-101113 AU - Stephen C Haskins AU - Megan Fiasconaro AU - Lauren Wilson AU - Jashvant Poeran AU - Jiabin Liu AU - Stavros Memtsoudis Y1 - 2020/02/12 UR - http://rapm.bmj.com/content/early/2020/02/12/rapm-2019-101113.abstract N2 - ER -